Discrete multi-step phase hologram for high frequency acoustic modulation  

作　　者：周梦晴 李照希 李怡 王业成 张娟 谌东东 全熠 杨银堂 费春龙 Meng-Qing Zhou;Zhao-Xi Li;Yi Li;Ye-Cheng Wang;Juan Zhang;Dong-Dong Chen;Yi Quan;Yin-Tang Yang;Chun-Long Fei(School of Microelectronics,Xidian University,Xi'an 710071,China)

机构地区：[1]School of Microelectronics,Xidian University,Xi'an 710071,China

出　　处：《Chinese Physics B》2024年第1期488-495,共8页中国物理B（英文版）

基　　金：Project supported by the China Postdoctoral Science Foundation (Grant No.2023M732745);the National Natural Science Foundations of China (Grant Nos.61974110 and 62104177);the Fundamental Research Funds for the Central Universities,China (Grant Nos.QTZX23022 and JBF211103);the Cooperation Program of XDU– Chongqing IC Innovation Research Institute (Grant No.CQ IRI-2022CXY-Z07)。

摘　　要：Acoustic holograms can recover wavefront stored acoustic field information and produce high-fidelity complex acoustic fields. Benefiting from the huge spatial information that traditional acoustic elements cannot match, acoustic holograms pursue the realization of high-resolution complex acoustic fields and gradually tend to high-frequency ultrasound applications. However, conventional continuous phase holograms are limited by three-dimensional(3D) printing size, and the presence of unavoidable small printing errors makes it difficult to achieve acoustic field reconstruction at high frequency accuracy. Here, we present an optimized discrete multi-step phase hologram. It can ensure the reconstruction quality of image with high robustness, and properly lower the requirement for the 3D printing accuracy. Meanwhile, the concept of reconstruction similarity is proposed to refine a measure of acoustic field quality. In addition, the realized complex acoustic field at 20 MHz promotes the application of acoustic holograms at high frequencies and provides a new way to generate high-fidelity acoustic fields.

关 键 词：discrete multi-step phase hologram econstruction quality 3D printing accuracy high-fidelity 

分 类 号：O42[理学—声学]